Wide Flange Steel I Beam: W8 × 28

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Glossary » Beams » Simply Supported » Uniformly Distributed Load » Three Equal Spans » Wide Flange Steel I Beam » W8 × 28
Wide Flange Steel I Beam | Single Span | Two Equal Spans | Three Equal Spans | Four Equal Spans

For a simply supported beam in three equal spans, we compute the displacement at the middle of the first and the third spans, and the maximum normal stress occuring at the second and third supports of the beam.
The tabulated data listed in this page are calculated based on the area moment of inertia (Ixx = 98.0 in4) for the W8 × 28 Wide Flange Steel I Beam and the typical Young's modulus (E = 3.046 × 107 psi) of steels. Note that the typical yielding stress of steels can range from 1.015 × 104 to 2.970 × 105 psi. The purpose of this page is to give a rough estimation of the load-bearing capacity of this particular beam, rather than a guideline for designing actual building structures. Please check your local building codes for regulatory requirements.

Note: The weight of the beam itself is not included in the calculation.

 Steel I Beam: W8 × 28 (Wide Flange 8 inch tall × 28 lbf/ft) L = 3.00 ft (lbf/ft) (in) (psi) 28.0 8.93 × 10-6 12.4 30.0 9.57 × 10-6 13.3 40.0 1.28 × 10-5 17.8 50.0 1.59 × 10-5 22.2 60.0 1.91 × 10-5 26.6 70.0 2.23 × 10-5 31.1 80.0 2.55 × 10-5 35.5 90.0 2.87 × 10-5 40.0 100 3.19 × 10-5 44.4 200 6.38 × 10-5 88.8 300 9.57 × 10-5 133 400 1.28 × 10-4 178 500 1.59 × 10-4 222 600 1.91 × 10-4 266 700 2.23 × 10-4 311 800 2.55 × 10-4 355 900 2.87 × 10-4 400 1000 3.19 × 10-4 444 2000 6.38 × 10-4 888 3000 9.57 × 10-4 1330 4000 0.00128 1780 5000 0.00159 2220 6000 0.00191 2660 7000 0.00223 3110 8000 0.00255 3550 9000 0.00287 4000 1.00 × 104 0.00319 4440 2.00 × 104 0.00638 8880 3.00 × 104 0.00957 1.33 × 104 4.00 × 104 0.0128 1.78 × 104 5.00 × 104 0.0159 2.22 × 104 6.00 × 104 0.0191 2.66 × 104 7.00 × 104 0.0223 3.11 × 104 8.00 × 104 0.0255 3.55 × 104 9.00 × 104 0.0287 4.00 × 104 1.00 × 105 0.0319 4.44 × 104 2.00 × 105 0.0638 8.88 × 104 3.00 × 105 0.0957 1.33 × 105 4.00 × 105 0.128 1.78 × 105 5.00 × 105 0.159 2.22 × 105 6.00 × 105 0.191 2.66 × 105 6.69 × 105 0.213 2.97 × 105
 Steel I Beam: W8 × 28 (Wide Flange 8 inch tall × 28 lbf/ft) L = 5.00 ft (lbf/ft) (in) (psi) 28.0 6.89 × 10-5 34.5 30.0 7.38 × 10-5 37.0 40.0 9.84 × 10-5 49.3 50.0 1.23 × 10-4 61.7 60.0 1.48 × 10-4 74.0 70.0 1.72 × 10-4 86.4 80.0 1.97 × 10-4 98.7 90.0 2.21 × 10-4 111 100 2.46 × 10-4 123 200 4.92 × 10-4 247 300 7.38 × 10-4 370 400 9.84 × 10-4 493 500 0.00123 617 600 0.00148 740 700 0.00172 864 800 0.00197 987 900 0.00221 1110 1000 0.00246 1230 2000 0.00492 2470 3000 0.00738 3700 4000 0.00984 4930 5000 0.0123 6170 6000 0.0148 7400 7000 0.0172 8640 8000 0.0197 9870 9000 0.0221 1.11 × 104 1.00 × 104 0.0246 1.23 × 104 2.00 × 104 0.0492 2.47 × 104 3.00 × 104 0.0738 3.70 × 104 4.00 × 104 0.0984 4.93 × 104 5.00 × 104 0.123 6.17 × 104 6.00 × 104 0.148 7.40 × 104 7.00 × 104 0.172 8.64 × 104 8.00 × 104 0.197 9.87 × 104 9.00 × 104 0.221 1.11 × 105 1.00 × 105 0.246 1.23 × 105 2.00 × 105 0.492 2.47 × 105 2.41 × 105 0.592 2.97 × 105
 Steel I Beam: W8 × 28 (Wide Flange 8 inch tall × 28 lbf/ft) L = 10.0 ft (lbf/ft) (in) (psi) 28.0 0.00110 138 30.0 0.00118 148 40.0 0.00157 197 50.0 0.00197 247 60.0 0.00236 296 70.0 0.00276 345 80.0 0.00315 395 90.0 0.00354 444 100 0.00394 493 200 0.00787 987 300 0.0118 1480 400 0.0157 1970 500 0.0197 2470 600 0.0236 2960 700 0.0276 3450 800 0.0315 3950 900 0.0354 4440 1000 0.0394 4930 2000 0.0787 9870 3000 0.118 1.48 × 104 4000 0.157 1.97 × 104 5000 0.197 2.47 × 104 6000 0.236 2.96 × 104 7000 0.276 3.45 × 104 8000 0.315 3.95 × 104 9000 0.354 4.44 × 104 1.00 × 104 0.394 4.93 × 104 2.00 × 104 0.787 9.87 × 104 3.00 × 104 1.18 1.48 × 105 4.00 × 104 1.57 1.97 × 105 5.00 × 104 1.97 2.47 × 105 6.00 × 104 2.36 2.96 × 105 6.02 × 104 2.37 2.97 × 105
 Steel I Beam: W8 × 28 (Wide Flange 8 inch tall × 28 lbf/ft) L = 15.0 ft (lbf/ft) (in) (psi) 28.0 0.00558 311 30.0 0.00598 333 40.0 0.00797 444 50.0 0.00996 555 60.0 0.0120 666 70.0 0.0140 777 80.0 0.0159 888 90.0 0.0179 999 100 0.0199 1110 200 0.0399 2220 300 0.0598 3330 400 0.0797 4440 500 0.0996 5550 600 0.120 6660 700 0.140 7770 800 0.159 8880 900 0.179 9990 1000 0.199 1.11 × 104 2000 0.399 2.22 × 104 3000 0.598 3.33 × 104 4000 0.797 4.44 × 104 5000 0.996 5.55 × 104 6000 1.20 6.66 × 104 7000 1.40 7.77 × 104 8000 1.59 8.88 × 104 9000 1.79 9.99 × 104 1.00 × 104 1.99 1.11 × 105 2.00 × 104 3.99 2.22 × 105 2.68 × 104 5.33 2.97 × 105
 Steel I Beam: W8 × 28 (Wide Flange 8 inch tall × 28 lbf/ft) L = 20.0 ft (lbf/ft) (in) (psi) 28.0 0.0176 553 30.0 0.0189 592 40.0 0.0252 790 50.0 0.0315 987 60.0 0.0378 1180 70.0 0.0441 1380 80.0 0.0504 1580 90.0 0.0567 1780 100 0.0630 1970 200 0.126 3950 300 0.189 5920 400 0.252 7900 500 0.315 9870 600 0.378 1.18 × 104 700 0.441 1.38 × 104 800 0.504 1.58 × 104 900 0.567 1.78 × 104 1000 0.630 1.97 × 104 2000 1.26 3.95 × 104 3000 1.89 5.92 × 104 4000 2.52 7.90 × 104 5000 3.15 9.87 × 104 6000 3.78 1.18 × 105 7000 4.41 1.38 × 105 8000 5.04 1.58 × 105 9000 5.67 1.78 × 105 1.00 × 104 6.30 1.97 × 105 1.50 × 104 9.48 2.97 × 105
 Steel I Beam: W8 × 28 (Wide Flange 8 inch tall × 28 lbf/ft) L = 25.0 ft (lbf/ft) (in) (psi) 28.0 0.0431 864 30.0 0.0461 925 40.0 0.0615 1230 50.0 0.0769 1540 60.0 0.0923 1850 70.0 0.108 2160 80.0 0.123 2470 90.0 0.138 2780 100 0.154 3080 200 0.308 6170 300 0.461 9250 400 0.615 1.23 × 104 500 0.769 1.54 × 104 600 0.923 1.85 × 104 700 1.08 2.16 × 104 800 1.23 2.47 × 104 900 1.38 2.78 × 104 1000 1.54 3.08 × 104 2000 3.08 6.17 × 104 3000 4.61 9.25 × 104 4000 6.15 1.23 × 105 5000 7.69 1.54 × 105 5240 8.06 1.62 × 105
 Steel I Beam: W8 × 28 (Wide Flange 8 inch tall × 28 lbf/ft) L = 30.0 ft (lbf/ft) (in) (psi) 28.0 0.0893 1240 30.0 0.0957 1330 40.0 0.128 1780 50.0 0.159 2220 60.0 0.191 2660 70.0 0.223 3110 80.0 0.255 3550 90.0 0.287 4000 100 0.319 4440 200 0.638 8880 300 0.957 1.33 × 104 400 1.28 1.78 × 104 500 1.59 2.22 × 104 600 1.91 2.66 × 104 700 2.23 3.11 × 104 800 2.55 3.55 × 104 900 2.87 4.00 × 104 1000 3.19 4.44 × 104 2000 6.38 8.88 × 104 2530 8.06 1.12 × 105
 Steel I Beam: W8 × 28 (Wide Flange 8 inch tall × 28 lbf/ft) L = 40.0 ft (lbf/ft) (in) (psi) 28.0 0.282 2210 30.0 0.302 2370 40.0 0.403 3160 50.0 0.504 3950 60.0 0.605 4740 70.0 0.705 5530 80.0 0.806 6320 90.0 0.907 7110 100 1.01 7900 200 2.02 1.58 × 104 300 3.02 2.37 × 104 400 4.03 3.16 × 104 500 5.04 3.95 × 104 600 6.05 4.74 × 104 700 7.05 5.53 × 104 800 8.06 6.31 × 104
 Steel I Beam: W8 × 28 (Wide Flange 8 inch tall × 28 lbf/ft) L = 50.0 ft (lbf/ft) (in) (psi) 28.0 0.689 3450 30.0 0.738 3700 40.0 0.984 4930 50.0 1.23 6170 60.0 1.48 7400 70.0 1.72 8640 80.0 1.97 9870 90.0 2.21 1.11 × 104 100 2.46 1.23 × 104 200 4.92 2.47 × 104 300 7.38 3.70 × 104 328 8.06 4.04 × 104
 Steel I Beam: W8 × 28 (Wide Flange 8 inch tall × 28 lbf/ft) L = 60.0 ft (lbf/ft) (in) (psi) 28.0 1.43 4970 30.0 1.53 5330 40.0 2.04 7110 50.0 2.55 8880 60.0 3.06 1.07 × 104 70.0 3.57 1.24 × 104 80.0 4.08 1.42 × 104 90.0 4.59 1.60 × 104 100 5.10 1.78 × 104 158 8.06 2.81 × 104
 Steel I Beam: W8 × 28 (Wide Flange 8 inch tall × 28 lbf/ft) L = 70.0 ft (lbf/ft) (in) (psi) 28.0 2.65 6770 30.0 2.84 7250 40.0 3.78 9670 50.0 4.73 1.21 × 104 60.0 5.67 1.45 × 104 70.0 6.62 1.69 × 104 80.0 7.56 1.93 × 104 85.3 8.06 2.06 × 104
 Steel I Beam: W8 × 28 (Wide Flange 8 inch tall × 28 lbf/ft) L = 80.0 ft (lbf/ft) (in) (psi) 28.0 4.51 8840 30.0 4.84 9470 40.0 6.45 1.26 × 104 50.0 8.06 1.58 × 104
 Steel I Beam: W8 × 28 (Wide Flange 8 inch tall × 28 lbf/ft) L = 90.0 ft (lbf/ft) (in) (psi) 28.0 7.23 1.12 × 104 30.0 7.75 1.20 × 104 31.2 8.06 1.25 × 104